The gas temperature variation of neka dual pressure hrsg with duct burner obtained by the simulation program and the corresponding measured values are shown and compared in fig. The modifications of a single pressure hrsg to multipressures have also improve the energy efficiency of the heat recovery steam generator unit 1. Design of hrsgs and gas turbine cycle has been done proportional to steam turbines in the reference cycle. Siemens has its own benson test rig for the trials. Ees thermodynamic software has been used for modeling new cycle. Benson technology power plant solutions siemens siemens. Deaerator was added to enhance ef ficiency and remove dissolved gases in feed water. The results of the trials have led to the creation of the worlds largest database on heat transfer and pressure drop in evaporator tubes, and support the development and validation of the siemens benson design software. Other readers will always be interested in your opinion of the books youve read. The key operating parameters of this hrsg design are summarized in table 3. With a singlepressure hrsg, about 30% of the total plant output is generated in the steam tur bine.
Tracing back over 5 years, vogt is credited with producing the very first hrsg, the first threepressurelevel hrsg, the first reheat hrsg and others. What is the typical pressure and temperature of lp, mp, hp. Performance optimization of dual pressure heat recovery steam generator hrsg in the tropical rainforest. The software that was used to carry out the modelling. Effective use of heatrecovery steam generators journal. Constructal design and optimization of a dual pressure. Design of dual pressure heat recovery steam generator. We discuss some practical concepts in hrsg design, and the importance of. Multiobjective optimization of a combined heat and power. Watersteam treatment programs and chemistry control for heat. Optimum design of the heat recovery steam generator hrsg has noticeable effects on the thermal efficiency of the combined cycle power plants. The same principle is also used for marine propulsion, where it is called a combined gas and steam cogas plant. Customer lp gt fuels nghsdnaphtha hp 200 dual pressure hrsg behind. Performance optimization of dual pressure heat recovery steam generator hrsg in.
It is shown how to simultaneously optimize the operating and geometric design parameters of the hrsg by using the constructal. The present research is focused on the design of a hrsg, including a dualpressure steam generator cycle that is intended for use in a typical gas turbine unit having a power output of 60 mw. Unlike in a conventional steam generator, where the steam demand. The software has a specdriven approach to piping design that eliminates the need to enter specifications more than once. Effect of compression ratio on performance of combined.
One damper on the inlet to the hrsg and the other damper isolating the stack. Heatrecovery steam generators hrsgs, often called wasteheat boilers, recover energy from gas streams in a wide range of chemicalprocess plants. For this reason, designers often use dualpressure hrsg systems to. The results show that the average of difference between the numerical and the measured values of parameters at various sections of hrsg was about 1. Medium to high pressure systems process applications hrsg. A dualpressure arrangement can increase the power output of the steam cycle by up to 10%, and an additional 3% can be achieved with a triplepressure cycle 1. Design and offdesign simulations of combined cycles. This power plant is equipped with dualpressure heat recovery steam generator, compressed air cooling, steam injection and vapor extraction systems. This choice was made based on the analysis of losses carried out in 12, in which it is found that increasing the number. Design principles and sizing approach of unfired once.
In this work, attention was focused on a dual pressure reheat dprh hrsg to maximize the heat recovery. Conax technologies brings an improved design exhaust gas temperature sensors for ft8gg8 turbines. Hrsg description the dual pressure heat recovery steam generator is. For a conventional fired steam generator, one can assume a desired steam flow rate and exit gas temperature and then fire the necessary amount of fuel to meet the steam demand. The data were analysed using various energy equations.
Pdf design of dual pressure heat recovery steam generator for. Transient modeling of singlepressure combined cycle power. The book examines recent trends and developments in boiler design and technology and presents novel ideas for improving boiler efficiency and lowering gas pressure drop. Using double pressure heat recovery steam generator. Heat recovery steam generators can be made up from a number of components, including evaporators, economizers, superheaters, reheater, integral deaerators and preheaters.
A suitable solution to minimize this negative effect is to raise inlet turbine temperature and reduce temperature of inlet air to gt compressor. I suspect that every industry has its own criteria for steam systems, and i am only familiar with systems in an oil refinery. In this paper, the constructal design and optimization of a dual pressure heat recovery steam generator was conducted for minimizing the exergy destruction rate. High pressure steam generators as single flametube boilers with a performance of up to 17.
The efficiency analysis of different combined cycle power. The approach for designing a hrsg is in short words. Thermodynamic modeling and optimization of a dual pressure. The starting point in the engine ering of a hrsg is the evaluation of its steam generation capability and gas and steam temperature profiles. Using direct search method by the ees software, the combined system is. The ge preengineered, combined cycle product line is designated stag, which is an acronym for steam and gas. All you need is our ip tv software, your pc, and internet connection today, many companies are also using live internet tv and webcams or webcasts to conduct business with employees in different parts. Finally it has been tried to analyze functional parameters by exergy analysis. Thermodynamic modeling and optimization of a dual pressure reheat combined power cycle. They play the same role in cogeneration and combinedcycle plants that generate steam and electric power, and in facilities that incinerate solid, liquid or gaseous waste.
For a hrsg integrated in a hybrid solar thermal power plant there are the same design criteria valid as for hrsgs in typical ccps. Ambient temperature, pressure ratio in the gas part and temperature at the inlet to the gas turbine were investigated as the most significant factors which affect efficiency and power production in whole system. Earlier still tim was vice president of engineering for e. Their methodology applies a mixed nonlinear program. They worked with a simulation program that included three models. It primarily addresses the thermodynamic and thermohydraulic design of the evaporator system in benson steam. Heat recovery steam generators hrsg the heat recovery steam generator hrsg provides the thermodynamic link between the gas turbines and steam turbines in a combinedcycle power plant. Flexible operation of combined cycle gas turbine power. Designed cycle includes one 150 mw ge 7f engine, singlepressure type hrsg and an integral selfheating deaerator with a condensing steam turbine. On land, when used to make electricity the most common type is called a combined cycle gas turbine ccgt plant. Forney utilizes two biplane dampers for superior isolation and control. Effect of compression ratio on performance of combined cycle gas turbine thamir k. Fire tube boilers also referred to as smoke tube boilers, shell.
For hrsg bypass applications, forney provides a better, faster, cheaper alternative to a typical flap and guillotine damper arrangement. Whether youve loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. Hysys software was used to model the temperature across the heating surfaces, and matlab software was used to determine. Fired heater design engineering systems simulation software. The pressure drop is imposed in porous media sections, in. Finally it has been tried to analyze exergy efficiency, exergy losses, temperature of the stack exhausting gas etc. Thermodynamic modeling and optimization of multipressure.
Gt pro output hbd for 1200 mw nonreheat combined cycle with desalination producing 42 migd desalinated water. Hysys software was used to model the temperature across the heating surfaces. Operating characteristics of a triple pressure reheat hrsg are analyzed using a commercial software package gate cycle by ge enter software. Each stag combined cycle system is an engineered equipment package eep consisting of ge gas turbines, steam turbines, generators, heat recovery steam generators hrsgs and controls. A schematic diagram of the system of this study can be seen in fig. Therefore, the hrsg must be carefully designed in order to maximize the heat exchanged and to improve the overall performance of the plant. Heat rejection systems that reject heat to the environment. At the plant where i spent the first fifteen years of my career, we had the following steam systems all expressed in psi. Used hrsg is double pressure with reheat equipped with duct burner. They concluded that increasing pressure levels in hrsg increases both exergy efficiency and investment cost. Performance optimization of dual pressure heat recovery.
The results of the analysis show that it is possible to obtain the thermal efficiency 52. More than 100 benson heatrecovery steam generators have been commissioned to date or are currently under construction. Design methodology of heat recovery steam generator in. In this paper, constructal design of a dual pressure hrsg is proposed. This is the design case,where for each surface we solve for. An energetic and exergetic optimization is conducted on a combined cycle power plant of net power of 400 mw. Boiler fundamentals steam production and steam uses. Also in the second design a dual pressure hrsg with reheat according to bandar abbas power plant has been used. A combined cycle power plant is an assembly of heat engines that work in tandem from the same source of heat, converting it into mechanical energy.
It helps plant engineers understand and evaluate the performance of. Combined cycles gas turbines ccgt are a lot used to acquire a highefficiency power plant. Design methodology of heat recovery steam generator in electric. Benson technology power plant solutions siemens ukraine. Heat recovery steam generation an overview sciencedirect topics. The steam turbine, hrsg, condensate, feed water and associated systems.
Energetic and exergetic optimization of a combined cycle. Hrsg design optimized with 3d modeling power engineering. Alex has a master of engineering meng degree from the university of bristol, graduating in 2011. Hysys software was used to model the temperature across the heating. The calculation routine determines all the design parameters including configuration and area of each heat exchanger. Heat recovery steam generator user group 2019 nottingham.
Watch 4000 online television stations from your notebook. Oncethrough steam generator otsg is a new technology introduced for heat recovery in power systems. Engineers typically establish the specification at the beginning of a project. Design of dual pressure heat recovery steam generator for. Design of dual pressure heat recovery steam generator for combined. Analysis of the dynamic characteristics of a single. Modelling and practical studying of heat recovery steam generator. A new method to boost performance of heat recovery steam.
The results show that the maximum heat transfer occurs in the evaporator section for highpressure levels, and in the economizer section for lowpressure. It is known the performance of a gas turbine gt has strong dependence of climate conditions. Combined cycle power plant may have various configurations according to the number of hrsg pressure transient modeling of singlepressure combined cycle power plant exposed to load reduction. One of the key elements of increasing the thermal efficiency of a combined cycle power plant ccpp is to improve the design and operation of the heat recovery steam generators hrsg utilized in the cycle. The first combined cycle power plant with a benson heatrecovery steam generator hrsg the 390mw cottam cdc, located in great britain was successfully commissioned in 1999. The hrsg supplies highpressure hp and lowpressure lp steam turbine and the deaerator, respectively. Design of dual pressure heat recovery steam generator for combined power. Each hrsg solution is customengineered to meet your desired operating flexibility and performance requirements. Optimum configuration for single pressure sp, dual pressure dp and triple pressure tp heat recovery steam generator hrsg is presented to improve heat recovery and thereby exergy efficiency of combined cycle.